ltc4065l Linear Technology Corporation, ltc4065l Datasheet
ltc4065l
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ltc4065l Summary of contents
Page 1
... The full-featured LTC4065L also includes automatic re- charge, low-battery charge conditioning (trickle charging) and soft-start (to limit inrush current). The LTC4065L is available in a tiny 6-lead, low profile (0.75mm) 2mm × 2mm DFN package. Complete Charge Cycle (180mAh Battery) 100mA + 4 ...
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... CC EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER LTC4065LEDC LTC4065LXEDC Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...
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... R = 1.33k (Note 5) PROG I = 150mA BAT Note 4: Although the LTC4065L functions properly at 3.75V input, full charge current requires an input voltage greater than the desired final battery voltage per the ∆V Note expressed as a fraction of measured full charge current C/10 with indicated PROG resistor. ...
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... TEMPERATURE (°C) 4065L G07 4 Battery Regulation (Float) Voltage vs Temperature 4.24 4.23 4.22 4.21 4.20 4.19 4.18 4.17 4.16 –50 – TEMPERATURE (°C) Charge Current vs Battery Voltage (LTC4065L) 300 25°C A 250 R = 800Ω PROG 200 150 100 (V) BAT PROG Pin Voltage vs Charge Current 1 ...
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... Timer Accuracy vs Temperature –1 –2 –3 –4 –5 –6 –7 –50 – 100 25 TEMPERATURE (°C) 4065L G18 LTC4065L/LTC4065LX Manual Shutdown Supply Current vs Temperature –50 – TEMPERATURE (°C) 4065L G12 Trickle Charge Current ...
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... EN (Pin 5): Enable Input Pin. Pulling this pin above the manual shutdown threshold (V the LTC4065L in shutdown mode. In shutdown mode, the LTC4065L has less than 20µA supply current and less than 1µA battery drain current. Enable is the default state, but the pin should be tied to GND if unused. ...
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... SHUTDOWN ENB – 0.82V REF 1.2V PROG 0. – C/10 R4 0.1V CHRG R5 2 – 2.9V LOBAT + BAT TRICKLE CHARGE DISABLED ON THE LTC4065LX 1× 205× D1 – – ENABLE PROG GND PROG Figure 1. LTC4065L Block Diagram ...
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... BAT pin voltage falls below V 4.1V). When the input voltage is not present, the battery drain current is reduced to less than 4µA. The LTC4065L can also be shut down by pulling the EN pin above the shutdown threshold voltage. This reduces input quiescent current to less than 20µA and battery drain current to less than 1µA. ...
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... Shutdown Mode The LTC4065L can be disabled by pulling the EN pin above the shutdown threshold (approximately 0.82V). In shut- down mode, the battery drain current is reduced to less than 1µA and the supply current to about 20µA. ...
Page 10
... LTC4065L results in the junction temperature approach- ing 115°C, the amplifier (TA) will begin decreasing the charge current to limit the die temperature to approxi- mately 115°C. As the battery voltage rises, the LTC4065L either returns to constant-current mode or enters con- stant-voltage mode straight from constant-temperature mode ...
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... CHRG STRONG PULL-DOWN 1/4 CHARGE CYCLE (1.125 HOURS) DEFECTIVE BATTERY IS V < 2.9V? BAT BAD BATTERY MODE NO CHARGE CURRENT CHRG PULSES (2Hz) V < > SHDN THRESHOLD *LTC4065L ONLY; LTC4065LX HAS FULL CHARGE CURRENT. ENABLE UVLO > 3.6V AND CC V > 80mV? CC BAT YES YES ≤ 2.9V V 2.9V < ...
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... This feature is particularly useful if the LTC4065L is powered from a supply with long leads (or any relatively high output impedance). For example, USB-powered systems tend to have highly variable source impedances (due primarily to cable quality and length) ...
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... PROG pin and the filter capacitor to ensure stability. Power Dissipation Due to the low charge currents unlikely that the LTC4065L will reduce charge current through thermal feedback. Nonetheless, the LTC4065L power dissipation can be approximated by: , the following PROG ...
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... LTC4065L package is soldered to the PC board ground. Correctly soldered to a 2500mm sided 1 oz. copper board the LTC4065L has a thermal resistance of approximately 60°C/W. Failure to make thermal contact between the Exposed Pad on the backside of the package and the copper board will result in thermal resistances far greater than 60° ...
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... U DC Package 6-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703) 0.675 ±0.05 PIN 1 BAR PACKAGE TOP MARK OUTLINE (SEE NOTE 6) 0.25 ± 0.05 0.200 REF LTC4065L/LTC4065LX R = 0.115 0.38 ± 0.05 TYP 0.56 ± 0. SIDES) 2.00 ±0.10 (4 SIDES 0.25 ± 0.05 0.75 ± ...
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... LTC4065L/LTC4065LX RELATED PARTS PART NUMBER DESCRIPTION Battery Chargers LTC1734 Lithium-Ion Linear Battery Charger in ThinSOT LTC1734L Lithium-Ion Linear Battery Charger in ThinSOT LTC4050 Lithium-Ion Linear Battery Charger Controller LTC4054 Standalone Linear Li-Ion Battery Charger with Integrated Pass Transistor in ThinSOT LTC4054L Standalone Linear Li-Ion Battery Charger ...